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3 years ago

In what part of the cell cycle does the DNA make a copy of itself?

1 answer:

3 0

A. Interphase.

The cell makes a copy of DNA during the S-phase which is in the interphase. An easy way to remember this is by realizing that the S stands for synthesis and DNA Synthesis is what it is called.

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Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the di

Svetllana [295]

Explanation:

Hemophilia is a disease that is characterized by an abnormal blood clotting process. There are many different proteins that are involved in the clotting process and a single mutation or change in one of them could result in serious effects. Hemophilia is characterized by an abnormal version of one of the many proteins involved in the clotting process, the proteins that are commonly affected are the coagulation factor 8 or 9 (VIII or IX). These abnormal proteins are caused by a mutation in the gene (within the DNA) that codifies for the production of each protein. In other words, a mutation in the part of the DNA, (gene F8) will lead to a dysfunctional coagulation factor VIII and a mutation in the gene F9 will lead to a dysfunctional coagulation factor IX. Importantly, these mutations could be inherited and could cause hemophilia. Therefore, an error in the DNA and subsequently, an error in the protein will cause hemophilia. Finally, it is important to mention that there are other types of hemophilia that are not caused by the above-mentioned mutations, such as acquired hemophilia.

3 0

2 years ago

Viruses cause disease like : (a) dysentery (b) malaria. (c) hepatitis B. (d) tuberculosis

Damm [24]

Viruses cause disease like tuberculosis.

tuberculosis is an infectious bacterial disease characterized by the growth of nodules (tubercles) in the tissues, especially the lungs.

8 0

3 years ago

Enzymes are important because they (1 point)

mylen [45]

Speed up chemical reactions (Catalysts)

4 0

3 years ago

The greatest geohazard for people living in hurricane-prone coastal regions is elevation onshore and bathymetry offshore because

Georgia [21]

Answer:

i think b i not 100%

Explanation:

im going to try c on my test

5 0

3 years ago

Differences between arteries, veins and capillaries

matrenka [14]

Answer:

There are three main types of blood vessels:

1)Artery ---

i) It is a blood vessel having a thick wall.

ii) It carries blood from the heart to different parts of the body.

iii) On regulatory demand of the body it can dilate or constrict.

iv) It doesn't contain any valve.

v) All arteries carry oxygenated blood except the pulmonary artery.

2)Vein ---

i) It is a blood vessel having a thin wall.

ii) It brings blood from different parts to the heart.

iii) It can't dilate or constrict under normal conditions.

iv) It contains valves that allow the blood to flow in one direction towards the heart.

v) All veins carry deoxygenated blood except the pulmonary vein.

3)Capillary ---

i) It is a very narrow blood vessel that has very thin walls.

ii) It forms a network throughout the body in all living cells connecting arteries to veins.

iii) It can dilate or constrict according to the requirement of tissue.

iv) It doesn't have any valve.

v) It contains mixed blood as it connects arteries and veins

5 0

2 years ago